Merge version 2.57.6-1+rpi1 and 2.57.6-1+deb12u1 to produce 2.57.6-1+rpi1+deb12u1

diff --cc debian/changelog
index cc82e55b2d941240c0d7ac689bc904a7ce1748dc,5d4e8d63c58ee610d2f617ba386939f5d757b46c..04f80781f56fbb854f29f8286b23436889da1086
--- 1/debian/changelog
--- 2/debian/changelog
+++ b/debian/changelog
@@@ -1,11 -1,11 +1,20 @@@
- snapd (2.57.6-1+rpi1) bookworm-staging; urgency=medium
++snapd (2.57.6-1+rpi1+deb12u1) bookworm-staging; urgency=medium
 +
 +  [changes brought forward from 2.27.2-2+rpi1 by Peter Michael Green <plugwash@raspbian.org> at Thu, 24 Aug 2017 17:53:18 +0000]
 +  * Treat unknown derivatives the same as Debian.
 +  * Disable testsuite.
 +  * Fix clean target.
 +
-  -- Raspbian forward porter <root@raspbian.org>  Sun, 04 Dec 2022 12:24:55 +0000
++ -- Raspbian forward porter <root@raspbian.org>  Fri, 27 Mar 2026 07:14:19 +0000
++
+ snapd (2.57.6-1+deb12u1) bookworm-security; urgency=high
+ 
+   * Non-maintainer upload by the Security Team.
+   * data/systemd-tmpfiles: protect the per-snap tmp
+   * data: more precise prune pattern for tmpfiles (CVE-2026-3888)
+     (Closes: #1131120)
+ 
+  -- Salvatore Bonaccorso <carnil@debian.org>  Tue, 17 Mar 2026 22:17:14 +0100
  
  snapd (2.57.6-1) unstable; urgency=high